Diestock



FRANK JAMES MARTIN, OF GREENFIELD, MASSACHUSETTS, SSIGNOR TO MARTN MACHINE COMPANY, INU., OF TURNER-S FALLS, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

DIES'I'OCK.

Application filed March 5, 1321.

T all w/wm t may conce/rn Be it known that l, lVnAvn latins lilaii'riiv, citizen of the United States, residing at Greenfield, in the county oit ranlrlin and State of lv/lassachusetts, have invented new and useful Improvements in Diestocls, of which the iiollowing is a specification.

'lhis invention relates to improvements in die stocks.

rlhe invention is particularly` concerned with the provision ot a die stock which will accommodate a wide range oif round dies. Dies ot this type ordinarily have a hole in their outer peripheral surface and a longr tudinally-adjustable member on the die stock (usually one of the handles) is designed to engage in this hole to ,prevent the die from turning. rlhis adjustable member also serves to clamp the die against an abut` ment on the die stock. Dies of this type not only vary in diameter but also in height,- increasing in heighi as the diameter increases. The hole, referred to, is usually located centrally between t-he upper and lower faces oi the die, and accordingly, ii one t'ace ot the die rests upon a .fixed flange in the die stock, as desired, the holes tor dies ot various sizes will lie at varying distances from such flange and will not align with the longitudinal member.

i rThis invention has for an object to provide in a die stock of the type described, means for adj usting the longitudinally-movable clamping member to align it with the holes ot dies oi? various height-s.

rlhe invention also has for an object to provide a die stock having a die-receiving opening` having two oppositely-located curved walls ot different radii, which walls are connected by converging walls tangential to the curved walls.

The invention has for another object to provide in a die stock, a die-clamping member mounted therein for adjustment in two' dilterent directions.

Other objects and advantages will appear in the following description and in the illustrat-ive embodiment ot the invention in the accompanying drawings, in which,-

Fig. 1 is a plan view of a die stock embodying the invention;

Fig. 2 is a fragmentary elevational view thereof with parts broken away; and

Fig. 3 is a diagrammatical view illustrating the arrangement of the die stock. for

Specification of Letters Eatent.

Patented Jane 2t?, 192 Serial No. 449,904.

receiving` a wide range of dies of various sizes. Y

Referring to these drawings, the die stock body 5 has a receiving opening 6 therein, which is designed to receive round dies, such as the die d indicated in dotted lines in Fig. 1. This opening (S has two oppositely-located walls '7 and 8 which are curved on dii ,ferent radii,-tlie wall 7 being curved on a radius substantially equal to that of the smallest die, such as (Z, to be used, and the radius ot wall 8 being curved on a radius substantially equal to that of the largest die, such as d, to be used. The walls 7 and S are connected by straight walls 10, which are tangential, or substantially so, to the curved walls 7 and 8 and converge toward wall 7. Projecting into this opening 6, near the lower face ci' the die stock, is a flange 10, which is shaped substantially like the walls et the opening, and upon this flange the dies are adapted to rest.

The dies, such las nl and d', vary in height, as well as in outside diameter, as clearly illustratedin Fig. 2, and the upper face of the die stock body may, therefore, as illustrated at 11, slope downwardly from the large to the small end ofthe body. The dies CZ and d have smooth peripheries except for the provision of some means which will prevent the die from turning in the opening 6 after being clamped therein. Such means, generally, although not necessarily, takes the form of a hole, such as 7L and /L which are drilled radially into the dies fl and d and are adapted to be engaged by the clamping member of the die stock.

This clamping member, generally, although not necessarily, takes the form of a member having a screw-threaded connection with the die stock to permit it to be adjusted longitudinally thereof. Usually, such member is also made to serve as a handle for the die stock, although this is not essential. Thus, preferably, the clamping member, as illustrated, takes the form of a handle 12 having a screw-threaded portion 13 which threads into the die stock, or, more particularly, a part 14 secured thereto. A corresponding handle 15 is provided at the opposite end of the die stock. The inner end of clamping member 12 is preferably pointed, having a conical surface 16. This pointed end is designed to enter hole 7L or L, as the member 12 is turned to clamp die o3 or ci in the die stock, and thus prevent it from turning. Also, the conical surface 16 coacts with hole L or fr as a cam, tending to force die d or d downwardly against flange 10.

To permit member 12 to function, as described, with dies of various heights, it is essential that the member be adjustable up and down in the die stock. To this end, the part 111 is arranged for vertical adjustment in the die stock body. The body 5 is split, at its large end, suflic'ient to permit the portion 13 to freely pass therethrough, leaving two spaced parallel walls 17. Each of these walls is recessed to provide a guideway 18 to receive and closely fit the block-like part l/l and permit it to slide upwardly and downwardly. Vertical slots 19 pass through the walls 17 and open into the guideways 18. A thumb-screw 20 passes through each slot 19 and is threaded into block 14j. These screws, when loosened, permit member 14 to be moved up or down in its guideways to align member 12 with the holes', such as /LA and t, in dies of various heights, and when tightened serve to firmly clamp the block in adjusted position.

The invention has been disclosed herein, in an embodiment at present preferred, for illustrative purposes, but the scope of the invention is defined by the appended claims rather than by the foregoing description.

llhat I claim is- 1. In a die stock, having an opening to receive a die, means movable at right angles to the axis of the opening in the die for clamping` the latter therein, and means for adjusting the clamping means in a direction parallel to the axis of the opening in said die.

2. .A die stock, having an opening to receive dies of various heights and supporting means extending inwardly from the walls of said opening against which means one face of the die abuts when in said opening, means movable in a direction parallel to said supporting means for clamping a die in the latter, and means for adjusting the clamping means toward or away from said supporting means.

3. In a die stock, a body having a diereceiving opening, one end wall of which curved and the side walls of which lie substantially tangential to said curved walll and converge toward the opposite end wall.

4. In a die stock, a body having a diereceiving opening, one end wallY of which is curved and the side walls of which lie substantially tangential to said curved wall and converge toward the opposite end wall, a die-supj'iorting marginal flange extending into said opening, means to clamp a die therein, and means for adjusting the clamping means toward or away from said flange.

5. A die stock, comprising, a body provided with a die-receiving opening and a passage leading from said opening to one end of the body,'a block mounted in said passage, clamping means to clamp said block between the walls of said passage, and a clamping member adjustably mounted in said block and adapted to engage a die in said opening.

6. In a die stock, a body having a dien receiving opening, the oppositely-disposed end walls of which are curved from dif ferent radii and the side walls of which lic Substantially tangential to said curved walls.

7. In a die stock, a body having a diereceiving opening, the oppositely-disposed end walls of which are curved from different radii and the side walls of which lie substantially tangential to said curved walls, and a die-supporting marginal flange eX- tending into said opening.

In testimony whereof I have aflixed my signature.

FRANK JAMES MARTIN. 

